Żupny Castle is a Gothic castle, the former headquarters of the Wieliczka and Bochnia Salt Mine. The castle is located in the former mine complex and was designated as part of the Wieliczka and Bochnia UNESCO World Heritage Site, since an expansion in 2013.
A castle was built on top of the hillside in the 13th century, under the reign of Casimir III the Great and Sigismund I the Old. The current castle was built in a square formation, including living quarters outside the castle walls. From the castle"s earliest days, up until 1945, the castle was the headquarters of the Wieliczka Salt Mine. Currently, the castle houses an exhibition containing the history of Wieliczka from the past decades, and the only collection of saltshakers in Poland.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.